Fix some issues with Currency code for NPR

NRP was typo mistake so found the bug and fix. I have send pull for this Nepali currency previously.
Fix with $ for Colombian Peso

No symbol shown in Currency Settings selection so ;)
Fix indendation :heart:
added methods to dynamically get the address fields in WC_Checkout::create_order(), closes #6226
fixed the filling of the shipping fields in WC_Checkout::create_order()
Added missing vars in ajax add_variation() method, closes #6234

@mikejolley
Fixed images crop option and wc_get_image_size() function

Reported in http://wordpress.org/support/topic/hard-crop

@mikejolley
fixed some coding standards in includes/admin/class-wc-admin-settings.php
Minor Fix: Fixed Product Tag Arguments

Product Tags are labeled as non-hierarchical, but they are labeled with hierarchical labels instead of non-hierarchical labels. On the back-end everything shows up and works as intended. WordPress just ignores the mislabeled args and uses the correct ones by default. Always good to follow register_taxonomy() args :p.
Merge pull request #6232 from shivapoudel/patch-1

Fix some issues with Currency code for NPR
Merge pull request #6233 from shivapoudel/patch-2

Fix with $ for Colombian Peso
Merge pull request #6239 from vlandfair/patch-1

Minor Fix: Fixed Product Tag Arguments
Merge pull request #6235 from woothemes/6226-fix-order-fields-on-checkout

Dynamically get the address fields in WC_Checkout::create_order()
If a refund fails, delete refund post.

Fixes #6238
Added woocommerce_get_settings_ID filters.

Closes #6231
Fixing typo with get_error_message being referenced as a property
fixed wc_get_order_status_name() appear as wc 2.1 order status
Checking password reset key using phpass
Merge pull request #6243 from chrisnharvey/patch-2

Fixing "Invalid key" error when clicking link in password reset email
Readme for #6243